Rectal bleeding as the presenting sympton of acute pancreatitis.
D000208:Acute Disease; D000328:Adult; D001344:Autopsy; D003106:Colon / Q000473:pathology; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D010179:Pancreas / Q000473:pathology; D010195:Pancreatitis / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D012002:Rectal Diseases / Q000209:etiology*; D013154:Spleen / Q000473:pathology